Stabilizer doesn't stablize the voltages

Hello experts!

I have stabilizer at home. It has problem.
It gives same output as input. For example, if input is 230v then it outputs 230v, if inputs 210v then it outputs 210v, if inputs 200v then it outputs 200v. Means no stabilizing at output.

I think its reference voltage has been missed. Is this could be the problem?

What component should I replace?

Thank you,

Regards,
Princess

In my part of the world a mains voltage stabilizer is not needed because the electricity voltage is very stable.
My electricity is supposed to be 120.0VAC and I measure 120.0V most of the time and 119.0V or 121.0V sometimes.

Most stabilizer have an output specification such as 220V ±10%, which means that the output can be in range of 200 to 240V. So from the data you provided, one cannot deduce whether your stabilizer has any problem or not. You should check the output voltage below 200 Volts. e.g. output voltage when input is 160,180,190 etc.

Eshal said:

Hello experts!

I have stabilizer at home. It has problem.
It gives same output as input. For example, if input is 230v then it outputs 230v, if inputs 210v then it outputs 210v, if inputs 200v then it outputs 200v. Means no stabilizing at output.

I think its reference voltage has been missed. Is this could be the problem?

What component should I replace?

Thank you,

Regards,
Princess

Click to expand...

Most regulators are relay and auto-transformer based. For the range 200V to 230V, usually, the output voltage is equal to the input voltage. For a lower voltage, then voltage is increased. Test with lower voltages such as 160V, 180V, etc.

Hope this helps.
Tahmid.

thank you all.
Sorry if my information was insufficient.
Yes, i have checked. i have it for 160v and 150v too. output is still same as input.

thank you, i gained new knowledge.

Is it an electronic stabilizer or a ferroresonant transformer ?
Could you post brand and model ?

Could be a 4 stage autotransformer relay type. Does it have a PC interface ? with software?

a four-winding auto-transformer, which provides four levels
of line regulation: two boost-stage and one buck-stage and one thru.

It seems they use steps of 20% on taps so you need to test beyond +/-10% range to find the output nominal setting.
You tested < 10% range. i.e. 215V+/- 15 = 7%

albbg said:

Is it an electronic stabilizer or a ferroresonant transformer ?
Could you post brand and model ?

Click to expand...

Well the stabilizer in the asian world is not ferroresonant transformer (also called CVT in our country : constant voltage transformer)

Essentially the name stabilizer is a slang in local dialect for a device that has a transformer with a multi-tap secondary winding.
The winding are generally in the ratio 1(primary): 0.8:1.0:1.2(secondary) or some thing similar. Also there are set of relay/s that can decide which tap to select for connecting it to the load. Additionally there is a feedback circuit of comparators(opamp based) that monitoring the load/output voltage.

Essentially the device generally works on 1:1 (primary:secondary ratio) if the mains voltage goes below the nominal voltage(110/220V) by a factor of 20% the (1:1.2 primary:secondary) coil kicks in there by boosting the output voltage, or in case the input voltage exceeds input voltage by a factor of 20% the 1:0.8( primary:secondary) winding kicks in there by regulating the voltage back to around 220V.



Here ferroresonant transformer are higher grade devices used with expensive delicate equipment like PCs and scientific equipment that can't tolerate spikes the voltage disruption(momentarily) due to relay change overs in stabilizers as it would reset them.

Asimov

@all. you are using very hard languages in terms of electronics which i didn't read yet in my university classes.
but i agree with Antheasmith. I am asking for help for stabilizer for my refrigerator.

Here if the voltage was not stable then I would ask my electrical utility to fix it.

Eshal said:

Hello experts!

I have stabilizer at home. It has problem.
It gives same output as input. For example, if input is 230v then it outputs 230v, if inputs 210v then it outputs 210v, if inputs 200v then it outputs 200v. Means no stabilizing at output.

I think its reference voltage has been missed. Is this could be the problem?

What component should I replace?

Thank you,

Regards,
Princess

Click to expand...

what is the voltage(DC) at circuit.If the avr is transitor type ,test transistor ,diodes one by one.Also relay

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Eshal said:

Hello experts!

I have stabilizer at home. It has problem.
It gives same output as input. For example, if input is 230v then it outputs 230v, if inputs 210v then it outputs 210v, if inputs 200v then it outputs 200v. Means no stabilizing at output.

I think its reference voltage has been missed. Is this could be the problem?

What component should I replace?

Thank you,

Regards,
Princess

Click to expand...

what the voltage(DC) at circuit.If the avr is transitor type ,test transistor ,diodes one by one.Also relay

- - - Updated - - -

Eshal said:

Hello experts!

I have stabilizer at home. It has problem.
It gives same output as input. For example, if input is 230v then it outputs 230v, if inputs 210v then it outputs 210v, if inputs 200v then it outputs 200v. Means no stabilizing at output.

I think its reference voltage has been missed. Is this could be the problem?

What component should I replace?

Thank you,

Regards,
Princess

Click to expand...

what the voltage(DC) at circuit.If the avr is transitor type ,test transistor ,diodes one by one.Also relay

Yes, i have checked. i have it for 160v and 150v too. output is still same as input.

Click to expand...

Hi Eshal
I think that is a mechanical stabilizer . right ? i mean an auto transformer and then a DC motor or perhaps AC motor to make something like merry go round ! and then a sensor circuit which i suspect if it is an old one is some transistors or perhaps some op amps . so try to open the case and see the motor . change the input and see if it is going around or not . if not , check the command circuit ,and out put transistor and relay . are them intact ?

these are for very old stabilizers . but it also can be based on complete electronic circuit and ferrite transformer . ( high frequency ) . then everything is being changed ! mention it before everything ! ok ?
Best Wishes
Goldsmith

that is what i want to know.
@goldsmith
Thank you for good explanation. I will check and if possible then i will reply.

thank you all.